Explanipedia

Mapping Sulphide Mineralization in the Hawiah Area Using Transient Electromagnetic Methods Open

Panagiotis Kirmizakis, Abid Khogali, Konstantinos Chavanidis, Timothy Eatwell, Tomos Bryan , et al. · 2025

The Arabian–Nubian Shield (ANS) hosts numerous volcanogenic massive sulphide (VMS) deposits formed in submarine volcanic settings and enriched by hydrothermal processes, making it a critical region for mineral exploration due to the types …

Microbial fuel cells to monitor natural attenuation around groundwater plumes Open

Panagiotis Kirmizakis, Mark Cunningham, Deepak Kumaresan, Rory Doherty · 2025

This research presents a straightforward and economically efficient design for a microbial fuel cell (MFC) that can be conveniently integrated into a borehole to monitor natural attenuation in groundwater. The design employs conventional, …

Predicting Water Saturation in a Greek Oilfield with the Power of Artificial Neural Networks Open

Mohammed M. Gad, Ahmed Abdulhamid Mahmoud, George Panagopoulos, Paschalia Kiomourtzi, Panagiotis Kirmizakis , et al. · 2025

Water saturation plays a vital role in calculating the volume of hydrocarbon in reservoirs and defining the net pay. It is also essential for designing the well completion. Innacurate water saturation calculation can lead to poor decision-…

Reconstruction of the Subsurface of Al-Hassa Oasis Using Gravity Geophysical Data Open

Abid Khogali, Konstantinos Chavanidis, Panagiotis Kirmizakis, Alexandros Stampolidis, Pantelis Soupios · 2024

Al-Hassa city, located in Eastern Saudi Arabia, boasts the world’s largest oasis and the most expansive naturally irrigated lands. Historically, a total of 280 natural springs facilitated significant groundwater discharge and irrigation of…

Simulating Tree Root Water Uptake in the Frame of Sustainable Agriculture for Extreme Hyper-Arid Environments Using Modeling and Geophysical Techniques Open

Arya Pradipta, Nektarios N. Kourgialas, Yassir Mubarak Hussein Mustafa, Panagiotis Kirmizakis, Pantelis Soupios · 2024

In order to ensure sustainability in the agricultural sector and to meet global food needs, a particularly important challenge for our time is to investigate the possibility of increasing agricultural production in areas with extreme hyper…

A New Empirical Correlation for Pore Pressure Prediction Based on Artificial Neural Networks Applied to a Real Case Study Open

Ahmed Abdulhamid Mahmoud, Bassam Mohsen Alzayer, George Panagopoulos, Paschalia Kiomourtzi, Panagiotis Kirmizakis , et al. · 2024

Pore pressure prediction is a critical parameter in petroleum engineering and is essential for safe drilling operations and wellbore stability. However, traditional methods for pore pressure prediction, such as empirical correlations, requ…

Electromagnetic Insights: 3D Subsurface Modeling of Al-Hassa, Saudi Arabia Open

Abid Khogali, Panagiotis Kirmizakis, Konstantinos Chavanidis, Abdul Latif Ashadi, Tilman Hanstein , et al. · 2024

Al-Hassa area features Saudi Arabia's largest oasis and one of the world's largest naturally irrigated land. Moreover, Al-Hassa area is very close to Ghawar, known as the largest conventional oil-field in the world. Additionally, more than…

Bio-Electrochemical Systems to Monitor Biodegradation around Groundwater Plumes Open

Rory Doherty, Panagiotis Kirmizakis, Mark Cunningham, Deepak Kumaresan · 2024

This study introduces a straightforward and cost-effective Bio-Electrochemical System (BES) design that can be easily retrofitted into a borehole. The design uses standard bailers and Granular Activated Carbon (GAC) to create electrodes. T…

Iron Sulfide Scale Characterization: Insights from Spectral Induced Polarization Method Open

Panagiotis Kirmizakis, Tao Chen, Norah Aljeaban, Ammar El‐Husseiny, Mohamed Mahmoud , et al. · 2024

This study aims to explore the use and effectiveness of the spectral induced polarization (SIP) method for identifying and characterizing iron sulfide scales in oil and gas wells. Laboratory experiments using scale-amended columns aimed to…

Uncertainty with Varying Subsurface Permeabilities Reduced Using Coupled Random Field and Extended Theory of Porous Media Contaminant Transport Models Open

Seyed Morteza Seyedpour, Carla Henning, Panagiotis Kirmizakis, Swetlana Herbrandt, Katja Ickstadt , et al. · 2022

To maximize the usefulness of groundwater flow models for the protection of aquifers and abstraction wells, it is necessary to identify and decrease the uncertainty associated with the major parameters such as permeability. To do this, the…

Application of Combined Local and Global Optimization Algorithms in Joint Interpretation of Direct Current Resistivity and Seismic Refraction Data: A Case Study of Dammam Dome, Eastern Saudi Arabia Open

Paul Edigbue, İsmail Demirci, Irfan Akça, Hamdan Hamdan, Panagiotis Kirmizakis , et al. · 2022

The main geological structures in the Dammam Dome are defined by integrating geophysical measurements and applying new methodological approaches. Dammam Dome is characterized by a well-developed fracture/joints system; thus, high complexit…

Removal of benzene, MTBE and toluene from contaminated waters using biochar-based liquid activated carbon Open

Fawaz Alshahrani, Bassam Tawabini, Tawfik A. Saleh, M. Alrayaan, Subhi Alaama , et al. · 2022

A Comprehensive Study of Local, Global, and Combined Optimization Methods on Synthetic Seismic Refraction and Direct Current Resistivity Data Open

Paul Edigbue, İsmail Demirci, Irfan Akça, Hamdan Ali Hamdan, Panagiotis Kirmizakis , et al. · 2022

Most geophysical inversions face the problem of non-uniqueness, which poses a challenge in the mapping and delineation of the subsurface anomalies. To tackle this challenge, a combined local and global optimization approach is considered f…

First High-Power CSEM Field Test in Saudi Arabia Open

Abdul Latif Ashadi, Yardenia Martinez, Panagiotis Kirmizakis, Tilman Hanstein, Xiayu Xu , et al. · 2022

We conducted an initial high-power CSEM (controlled-source electromagnetic method) survey in a coastal salt-flat area in the broader area of Half Moon Bay, in the southern part of Dammam Peninsula in the eastern province of Saudi Arabia. T…

Removal of Benzene, MTBE and Toluene from Contaminated Waters Using Biochar-Based Liquid Activated Carbon Open

Fawaz Alshahrani, Bassam Tawabini, Tawfik A. Saleh, Mohammad Alrayaan, Subhi Alaama , et al. · 2022

Fuel compounds (BTEX) and fuel additives (MTBE) are pollutants frequently detected in groundwater resources. They may cause serious environmental and health issues and have to be removed from water before use. Ex-situ technologies such as …

Historic Underground Silver Mine Workings Detection Using 2D Electrical Resistivity Imaging (Durango, Mexico) Open

Hector R. Hinojosa, Panagiotis Kirmizakis, Pantelis Soupios · 2022

This paper presents an underground silver mining operation outside Gomez Palacio, Durango, Mexico, terminated around the 1930s, of which previous knowledge of its operations was poor. Durango’s current silver exploration campaigns are like…

Remote Sensing, Geophysics, and Modeling to Support Precision Agriculture—Part 1: Soil Applications Open

Arya Pradipta, Pantelis Soupios, Nektarios N. Kourgialas, Maria Doula, Zoi Dokou , et al. · 2022

Sustainable agriculture management typically requires detailed characterization of physical, chemical, and biological aspects of soil properties. These properties are essential for agriculture and should be determined before any decision f…

Remote Sensing, Geophysics, and Modeling to Support Precision Agriculture—Part 2: Irrigation Management Open

Arya Pradipta, Pantelis Soupios, Nektarios N. Kourgialas, Maria Doula, Zoi Dokou , et al. · 2022

Food and water security are considered the most critical issues globally due to the projected population growth placing pressure on agricultural systems. Because agricultural activity is known to be the largest consumer of freshwater, the …

Adsorption of Arsenic on Fe-Modified Biochar and Monitoring Using Spectral Induced Polarization Open

Panagiotis Kirmizakis, Bassam Tawabini, Omer Muhammad Siddiq, Dimitrios Kalderis, Dimitrios Ntarlagiannis , et al. · 2022

This work demonstrates the potential of Fe-modified biochar for the treatment of arsenic (As) simulated wastewater and the monitoring of adsorption in real-time. Specifically, we propose the utilization of date-palm leaves for the producti…

Gravity Survey on the Oil-Bearing Dammam Dome (Eastern Saudi Arabia) and Its Implications Open

Konstantinos Chavanidis, Alexandros Stampolidis, Panagiotis Kirmizakis, Μάρκος Δ. Τρανός, Maurizio Fedi , et al. · 2022

A detailed gravity survey with 235 measurements was carried out at the King Fahd University of Petroleum and Minerals campus, which is located at the crest of the oil-bearing Dammam Dome (Eastern Province of Saudi Arabia). This survey allo…

Seismic Risk Assessment of Chania, Greece, Using an Integrated Computational Approach Open

Ioannis Koutsoupakis, Yiannis Tsompanakis, Pantelis Soupios, Panagiotis Kirmizakis, SanLinn I. Kaka , et al. · 2021

This study develops a comprehensive seismic risk model for the city of Chania, in Greece, which is located ina highly seismic-prone region due to the occurrenceof moderate to large earthquakes because of the nearby major subduction zone be…

Optimization of the Groundwater Remediation Process Using a Coupled Genetic Algorithm-Finite Difference Method Open

Seyed Morteza Seyedpour, Iman Valizadeh, Panagiotis Kirmizakis, Rory Doherty, Tim Ricken · 2021

In situ chemical oxidation using permanganate as an oxidant is a remediation technique often used to treat contaminated groundwater. In this paper, groundwater flow with a full hydraulic conductivity tensor and remediation process through …

Enhancement of gasworks groundwater remediation by coupling a bio-electrochemical and activated carbon system Open

Panagiotis Kirmizakis, Rory Doherty, Carlos Alberto Mendonça, Ricardo Costeira, Christopher C. R. Allen , et al. · 2019

Here, we show the electrical response, bacterial community, and remediation of hydrocarbon-contaminated groundwater from a gasworks site using a graphite-chambered bio-electrochemical system (BES) that utilizes granular activated carbon (G…

Integration of geophysical and geochemical approaches to improve the understanding of peatland degradation Open

Laura McAnallen, Rory Doherty, Panagiotis Kirmizakis · 2018

In degraded peatlands under oxic conditions, phenol oxidase
can freely degrade phenolic compounds to produce conjugated
quinones within the solid phase. These compounds are
electrophilic and polar, and can alter the geophysical…

Bioelectrochemical systems for enhancement and monitoring of waste treatment Open

Panagiotis Kirmizakis, Rory Doherty, Carlos Alberto Mendonça, Ricardo Costeira, Christopher Allen , et al. · 2018

Treating environmental contaminants is a very important, and largely overlooked, environmental issue, that has received considerable public attention over the last few years.Bioelectrochemical systems (BESs) have gained increasingly popula…

Combined use of geophysical and geochemical methods to assess areas of active, degrading and restored blanket bog Open

Laura McAnallen, Rory Doherty, Shane Donohue, Panagiotis Kirmizakis, Carlos Alberto Mendonça · 2017

Here we combine the use of geo-electrical techniques with geochemical analysis of the solid and liquid phase to determine subsurface properties and general peatland health. Active, degrading and restored peat locations were analysed from t…

TECTONIC REGIME OF THE SUBURBAN (SOUTHERN) AREA OF CHANIA CITY IN CRETE ISLAND BY USING GEOPHYSICAL METHODS Open

C. Komelidou, Panagiotis Kirmizakis, Pantelis Soupios, A. Savaidis, Π. Τσούρλος · 2017

The transient electromagnetic method (TEM) has gained increasing popularity over the last years especially in hydrogeophysical and geotectonic applications. TEM-Fast 48HPC was used for collecting the sounding data during summer 2015. The m…

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